Leaving Open Philanthropy, going to Anthropic - Joe Carlsmith

On a career move, and on AI-safety-focused people working at AI companies.

Leaving Open Philanthropy, going to Anthropic - Joe Carlsmith Leaving Open Philanthropy, going to Anthropic Contents hide On my time at Open Philanthropy On going to Anthropic Last updated: 11.06.2025 Published: 11.03.2025 Leaving Open Philanthropy, going to Anthropic Podcast version (read by the author) here , or search for “Joe Carlsmith Audio” on your podcast app. Last Friday was my last day at Open Philanthropy. I’ll be starting a new role at Anthropic in mid-November, helping with the design of Claude’s character/constitution/spec. This post reflects on my time at Open Philanthropy, and i

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